1 files changed, 74 insertions, 0 deletions
diff --git a/editor/txmgr/TransactionItem.h b/editor/txmgr/TransactionItem.h
new file mode 100644
index 0000000000..6a8142a1fa
--- /dev/null
+++ b/editor/txmgr/TransactionItem.h
@@ -0,0 +1,74 @@
+/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#ifndef TransactionItem_h
+#define TransactionItem_h
+
+#include "nsCOMPtr.h"
+#include "nsCOMArray.h"
+#include "nsCycleCollectionParticipant.h"
+#include "nsISupportsImpl.h"
+#include "nscore.h"
+
+class nsITransaction;
+
+namespace mozilla {
+
+class TransactionManager;
+class TransactionStack;
+
+class TransactionItem final {
+ public:
+  explicit TransactionItem(nsITransaction* aTransaction);
+  NS_METHOD_(MozExternalRefCountType) AddRef();
+  NS_METHOD_(MozExternalRefCountType) Release();
+
+  NS_DECL_CYCLE_COLLECTION_NATIVE_CLASS(TransactionItem)
+
+  nsresult AddChild(TransactionItem& aTransactionItem);
+  already_AddRefed<nsITransaction> GetTransaction();
+  size_t NumberOfChildren() const {
+    return NumberOfUndoItems() + NumberOfRedoItems();
+  }
+  nsresult GetChild(size_t aIndex, TransactionItem** aChild);
+
+  MOZ_CAN_RUN_SCRIPT nsresult DoTransaction();
+  MOZ_CAN_RUN_SCRIPT nsresult
+  UndoTransaction(TransactionManager* aTransactionManager);
+  MOZ_CAN_RUN_SCRIPT nsresult
+  RedoTransaction(TransactionManager* aTransactionManager);
+
+  nsCOMArray<nsISupports>& GetData() { return mData; }
+
+ private:
+  MOZ_CAN_RUN_SCRIPT nsresult
+  UndoChildren(TransactionManager* aTransactionManager);
+  MOZ_CAN_RUN_SCRIPT nsresult
+  RedoChildren(TransactionManager* aTransactionManager);
+
+  MOZ_CAN_RUN_SCRIPT nsresult
+  RecoverFromUndoError(TransactionManager* aTransactionManager);
+  MOZ_CAN_RUN_SCRIPT nsresult
+  RecoverFromRedoError(TransactionManager* aTransactionManager);
+
+  size_t NumberOfUndoItems() const;
+  size_t NumberOfRedoItems() const;
+
+  void CleanUp();
+
+  ~TransactionItem();
+
+  nsCycleCollectingAutoRefCnt mRefCnt;
+  NS_DECL_OWNINGTHREAD
+
+  nsCOMArray<nsISupports> mData;
+  nsCOMPtr<nsITransaction> mTransaction;
+  TransactionStack* mUndoStack;
+  TransactionStack* mRedoStack;
+};
+
+}  // namespace mozilla
+
+#endif  // #ifndef TransactionItem_h